How to create a loop in ArcPy script?

How to create a loop in ArcPy script?

I was trying to look up how to either create a custom function for part of the code, but then also have a loop so it knew to iterate through each table in the folder. I wasn’t sure if I need to have the loop first, then the function, or have the loop inside the function.

When to use a while loop in Python?

Doing i-= 1 will only decrement the value of that particular element of the list, and the iteration will continue. Like the other answers here have suggested, you should use a while loop. Repeating many other answers, and just for completeness, you will need to use a while loop.

How to loop through ArcGIS tables in Python?

I have arcgis tables for each US state (plus DC and Puerto Rico). I want to iterate through those tables in a folder, join each one at a time to a shapefile, copy the joined features to a new featureclass in a different geodatabase, name that featureclass after the respective state name, then remove the join and move on to the next state.

How to move back an iteration in Python?

If you want to be able to move backwards, you must use a different mechanism, such as while: Python loop using range are by-design to be different from C/C++/Java for -loops. For every iteration, the i is set the the next value of range (5), no matter what you do to i in between.

Why does arcpy.delete _ management do not work?

In the script, I create a temporary folder to store intermediate data and I’d like to delete it after the script has ran, however arcpy.Delete_management does not work. My code is as follows:

Where do I put my folder in ArcPy?

Normally, you need to specify your folder in a file geodatabase, personal geodatabase or RDBMS table instead of a folder. But i skipped that question and gave a sample code for you above. Anyway, I prepare some code for you.

How to iterate through a table in Python?

I want to iterate through those tables in a folder, join each one at a time to a shapefile, copy the joined features to a new featureclass in a different geodatabase, name that featureclass after the respective state name, then remove the join and move on to the next state. I would consider myself a novice when it comes to python.

How to create a for loop in Python?

I am trying to create a for loop to process (clip) multiple rasters that are in one file using arcpy Clip Management Tool. I first used model builder to create a script with the correct parameters in arcmap.

Do you need a rectangle parameter in ArcPy?

If you use a shapefile as clipping geometry, it’s not necessary to specify the rectangle parameter in the Clip tool. If you have other arcpy related questions, you might want to ask them in gis.stackexchange.com, which is dedicated to GIS.

How to make multiple conditional statements in ArcPy?

My aim is to loop through a list of rasters and on the basis of a specified range assign each range with a constant 1, 2, 3, 4 or 5 value so that all the final rasters have pixels having a DN of 1,2,3,4, or 5. I copied the template from the following Desktop Help website and adjusted to my requirements.

How to calculate slope of line in ArcPy?

If there are negative values in the slope field, I would like to multiple them by -1 and if not, multiple them by +1 (or do nothing). My input is a line shapefile. First I added a field called “slope”, then I calculate the slope based on other fields.

How to create a new folder in ArcPy?

I don’t believe arcpy handles creation of folders, but I may be wrong. Import the os python module, and use os.path.exists (main_folder_path) to check if the folder exists.

How to create folder and subfolders in empty directory?

I want to create folder and subfolder in an a specific directory by writing code in python. It is important to check directory and folder if exist a specific subfolder, avoid duplicate or overwrite. I create a loop but when directory or folder is empty it does not go to the loop or it gives me error. I don’t know how can create my folders.

How to check the use of ArcPy in Python?

You can vote up the ones you like or vote down the ones you don’t like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar. You may also want to check out all available functions/classes of the module arcpy , or try the search function .

How does the exists function in ArcGIS work?

Determines the existence of the specified data object. Tests for the existence of feature classes, tables, datasets, shapefiles, workspaces, layers, and files in the current workspace. The function returns a Boolean indicating if the element exists.

How to return true if x does not exist in ArcPy?

Return False if x does not exist, True if x exists and was deleted. “”” deletted = False if arcpy.Exists(x): arcpy.Delete_management(x) deletted = True return deletted def cleanup(x, verbose=False, **args): “””Delete items in x and return number of items that could not be deleted.